It has also been suggested as an adjuvant in the control of diabetes and obesity , contributing to weight loss and reduction of abdominal fat . In addition, yerba mate protects DNA from oxidation and lipoperoxidation of low-density lipoproteins ( LDL or also called bad cholesterol ), acting in cardiovascular prevention .
It improves mood and concentration , as it is an important source of caffeine and B vitamins, which are essential for the proper functioning of the metabolism , acting as a coenzyme and participating in the catabolism reactions of nutrients to obtain energy from the food that is consumed. No less important, its consumption appears to be associated with an efficient immune response , taking into account the role of vitamins C and E , as well as other important minerals in our defenses. The consumption of yerba mate , although safe, due to its caffeine content can, if consumed in excess, or in the case of more sensitive people, cause irritability , anxiety , changes in the quality of sleep , insomnia and difficulty falling asleep . Its consumption is contraindicated for children , pregnant women and hypertensive patients .